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Table 3 Overall screening performance of screening methods in the SBSP

From: Performance of breast cancer screening methods and modality among Chinese women: a report from a society-based breast screening program (SBSP) in Shanghai

Screening methods No. of tests No. of patients Sensitivity (%) Specificity (%) PPV (%) NPV (%)
CBE 13906 57 61.4 51.5 0.5 99.7
US 9261 54 53.7 98.5 17.4 99.7
MAM 9238 55 67.3 98.1 17.9 99.8
US + MAM 9226 53 79.3 96.9 12.8 99.9
Screening modality a 9994 50 76.0 97.2 12.1 99.9
Real practice of the modality 13906 57 75.4 81.3 1.6 99.9
  1. a Among women following the Qibao screening modality strictly.
  2. Abbreviations: CBE: clinical breast examination; US: ultrasonography; MAM: mammography.